JP2008048399A - Apparatus and method of providing packet service status using access class restriction list in mobile communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of providing a packet service status using an access class restriction list in a mobile communication system. <P>SOLUTION: The disclosed method includes the steps of: inspecting, by a mobile communication terminal, whether there exists information which matches access class restriction information pre-stored to the mobile communication terminal in access class restriction list information contained in a system information block received over a network; providing a response containing packet service unavailable information in response to a packet service request when there exists the matching information; and displaying the provided packet service unavailable information. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a mobile communication system, and more particularly, after a mobile communication terminal camping on a suitable cell moves to another cell whose access class is restricted (access class barred), the access is performed. The present invention relates to an apparatus and a method for providing a cause to a user interface (MMI: Man Machine Interface) when transmission for a packet service is impossible due to class restrictions.

  The mobile communication terminal periodically transmits / receives information to / from the network from power on to power off. That is, when the mobile communication terminal needs to update information, the corresponding information is transmitted to the network. Similarly, when the network needs to update information, the corresponding information is transmitted to the mobile communication terminal. . The mobile communication terminal interprets information transmitted by the network and performs the following process according to a predefined method (that is, a communication protocol).

  In particular, when the mobile communication terminal is powered on, the mobile communication terminal searches for a cell in which the mobile communication terminal is located. After the search process, the mobile communication terminal performs a camping process if the cell is suitable. In this case, the mobile communication terminal can acquire location information by obtaining information unique to the current cell. The mobile communication terminal receives system information block periodically broadcast from the camped cell, and performs the following process according to a predefined method according to the received system information.

  FIG. 1 is a diagram illustrating a hierarchical structure of a general mobile communication system.

  As shown in FIG. 1, a radio network controller (RNC) and a mobile communication terminal each have a radio resource control layer (RRC) 110 and 120, a radio link control layer (RLC). Communication is performed using Link Controls 130 and 140, Medium Access Control (MAC) 150 and 160, and physical layers (L1) 170 and 180.

  The physical layers 170 and 180 correspond to an electrical and mechanical interface with a communication medium in a communication protocol of one layer, and data including a process for connection communication and connection release is stored in the mobile communication system. Convert to a signal that the equipment can communicate with. The medium access control layers 150 and 160 and the wireless connection control layers 130 and 140 perform logical connection, connection control, and error control using a two-layer communication protocol. The radio resource control layers 110 and 120 are configured to control and set the physical layers 170 and 180, the medium access control layers 150 and 160, and the wireless connection control layers 130 and 140 by exchanging control messages using a three-layer communication protocol. Handle.

  A GPRS mobility management layer (GMM) 105 is located above the radio resource control layer 110, and serves as a SGSN (Serving GPRS Support Node) or a GGSN (Gateway STP). Session management is performed by moving the mobile communication terminal in the GPRS mode.

  A user interface (MMI: Man Machine Interface) 102 communicates with the GPRS mobility management layer 105 to display the status of the current mobile communication terminal, or is provided with a specific input from the user and transmitted to a lower layer. . The GGSN is linked to the mobile communication terminal through the SGSN and serves as a router that connects the Internet and the mobile communication terminal.

  In the system information block (SIB), the access class restriction information set in the access class restriction list (cell class barred list) among the cell restriction information included in the system information 3 is If it matches the access class restriction information stored in the SIM card of the mobile communication terminal, the radio resource control layer 110 of the mobile communication terminal reports this to the GPRS mobility management layer 105. The system information is transmitted to and interpreted by the radio resource control layer 110 and is transmitted to the GPRS mobility management layer 105.

  If the GPRS mobility management layer 105 determines that registration is not successful, the GPRS mobility management layer 105 reports to the higher-level user interface 102 that only limited services are currently available. In the limited service provision state, only an emergency call is allowed, and a normal call is not allowed.

  When a service request that exceeds the capacity of the base station is temporarily generated by the subscriber, the base station can set an access class restriction on a cell currently managed.

  However, until now, the user interface 102 has not been provided for the reason that limited services are provided to the mobile communication terminal. This is because in this state, even if the user interface 102 requests a service (data communication service) from the GPRS mobility management layer 105, the GPRS mobility management layer 105 does not provide any response. In this case, since the user using the mobile communication terminal is not provided for the cause of the service not being provided, it is not possible to determine whether the mobile communication terminal has a problem or the current cell resource state. There is no problem.

  The present invention has been made in view of the above-described problems, and an object thereof is to provide a packet service state providing apparatus and method using an access class restriction list in a mobile communication system.

  Another object of the present invention is to provide an apparatus and method for providing access class restriction information to a user interface when a mobile communication terminal moves to an appropriate cell in which access class restriction is set.

  Another object of the present invention is to provide an apparatus and method for notifying a user of service provision impossibility information due to access class restriction when a mobile communication terminal moves to an appropriate cell in which access class restriction is set. There is.

  To achieve the above object, according to a method according to an aspect of the present invention, in a packet service state providing method using an access class restriction list in a mobile communication system, a mobile communication terminal that has moved from a characteristic cell to another cell is provided. When the access class restriction list information included in the system information received from the network has information matching the access class restriction information already stored by the mobile communication terminal, and the matching information is present Providing a response to the packet service request including the packet service provision impossible information and displaying the provided packet service provision unavailable information when the packet service request is made.

  In addition, according to the apparatus according to another aspect of the present invention, in the packet service state providing apparatus using the access class restriction list in the mobile communication system, the information of the access class restriction list included in the received system information and the already stored information When there is information that matches the access class restriction information, a cell restriction information processing unit that provides a response to the packet service request including the packet service provision impossible information when a packet service request is made, and provided by the cell restriction information processing unit The packet service disabling information is displayed, and when there is a packet service request from a user, a user interface requesting the packet service to the cell restriction information processing unit, receiving system information from a network, and the cell restriction Provide to the information processing department, in the cell Sources checks whether there is restrictions on access (access), if there is the limitation, and a control unit for controlling so as to provide the user interface.

  In addition, according to another aspect of the present invention, in the packet service state providing system using the access class restriction list in the mobile communication system, when the packet service request exceeding the base station capacity occurs, it is currently managed. When the access class restriction is set in the cell, and there is information that matches the network device that is broadcast included in the system information, the access class restriction list information included in the system information, and the stored access class restriction information, A mobile communication terminal that displays the packet service provision impossibility information and provides the packet service provision impossibility state.

  According to the present invention, since the mobile communication terminal provides and displays the packet service provision impossible information on the user interface, the packet service cannot be provided when the mobile communication terminal cannot be provided with the packet service. There is an advantage that it is possible to accurately grasp the cause of the problem.

  Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, if it is determined that a specific description of a related known technique or configuration departs from the gist of the present invention, a detailed description thereof will be omitted.

  Hereinafter, a packet service state providing apparatus and method using an access class restriction list in the mobile communication system of the present invention will be described.

  FIG. 2 is a block diagram illustrating a mobile communication terminal according to an embodiment of the present invention.

  As shown in FIG. 2, the control unit 220 receives system information including access class restriction information periodically broadcast from the network of the currently camped cell from the interface module 210 and provides the system information to the cell restriction information processing unit 240. To do. If there is information that matches the access class restriction information and the information stored in the SIM card of the mobile communication terminal and there is a request for packet service from the user interface 250, the cell restriction information processing unit 240 Control is performed so as to provide the user interface 250 with the packet service provision impossible information.

  The cell restriction information processing unit 240 has information that matches the access class restriction information and information stored in a SIM card of the mobile communication terminal according to an instruction and provision information of the control unit 220, and the user When there is a request for the packet service from the interface 250, the packet service provision impossible information is provided to the user interface 250. The cell restriction information processing unit 240 may be included in a GPRS mobility management hierarchy (GMM).

  The user interface (MMI) 250 functions as an interface between the user and the mobile communication terminal in the mobile communication terminal. In particular, according to the present invention, the cell restriction information processing unit 240 cannot use the packet service. When information is provided, the presence or absence of the packet service restriction is displayed.

  The storage unit 230 stores a program for controlling the overall operation of the apparatus and temporary data generated during the execution of the program. The SIM card can be included in the storage unit 230.

  The interface module 210 is a module for communicating with other nodes, and includes an RF processing unit, a baseband processing unit, and the like. The RF processing unit converts a signal received via an antenna into a baseband signal and provides the baseband signal to the baseband processing unit. The baseband signal from the baseband processing unit is actually transmitted on the air. The signal is converted into an RF (radio frequency) signal so that it can be transmitted through the antenna and transmitted through the antenna.

  With the above-described block configuration, the control unit 220 can perform the functions of the cell restriction information processing unit 240 and the user interface 250. The reason why the components are separately configured in the present invention is illustrated in order to distinguish each function. Accordingly, when the product is actually implemented, it is possible to configure the cell restriction information processing unit 240 or the user interface 250 so that all functions of the control unit 220 can be processed. It is also possible to configure so that only a part is processed by the control unit 220.

  FIG. 3 is a flowchart illustrating a process of providing a packet service state using an access class restriction list according to an embodiment of the present invention.

  As shown in FIG. 3, in step 305, the control unit of the mobile communication terminal scans the radio frequency with a lower physical layer in order to search for a cell that can be camped at the current position after power-on. Try to get started.

  If it is determined in step 305 that an appropriate cell is not found and camping is performed, the process proceeds to step 310 to perform camping on an arbitrary cell. The arbitrary cell indicates a cell that can be camping.

  If an appropriate cell is searched and camped in step 305, a general operation such as making a call or waiting in an idle state is performed in step 315. When moving to a new cell in step 320, in step 325, system information is obtained by analyzing a broadcast channel (BCH) including system information that informs the current state of the cell. Although not shown in the present invention, the control unit receives the system information through the camping process of step 310 even if the appropriate cell could not be camping at step 305.

  Thereafter, in step 330, the control unit controls the cell restriction information processing unit, and the information stored in the SIM card in the access class restriction list information set in the cell restriction information of the system information. To check if there is restriction information that matches.

  If there is no matching restriction information, the process proceeds to step 335 to perform a general registration process.

  If there is matching restriction information, the process proceeds to step 340 to check whether there is a request for packet service from the user interface (MMI).

  If there is a request for the packet service in step 340, the process proceeds to step 345, where packet service provision impossible information is provided to the user interface based on the access class restriction information.

  Thereafter, in step 350, the user interface displays the packet service provision failure information as shown in FIG.

  Thereafter, the algorithm according to the present invention is terminated.

  FIG. 4 is a message flowchart illustrating a packet service state providing process according to an embodiment of the present invention.

  As shown in FIG. 4, when there is a packet service request from the user, the user interface (MMI) 410 transmits an “Activate PDP Context Request” message to the GPRS mobility management layer 420 in step (a). Request call setup for packet service. The “Activate PDP Context Request” message is a message for the mobile communication terminal to request activation of packet data protocol (PDP) to request packet service provision. The information for providing the packet service includes, for example, an assigned IP address for IP (Internet Protocol) communication.

  If the packet service cannot be provided due to an access class restriction, the GPRS mobility management layer 420 performs session management called access class block (access class block) indicating that the packet service cannot be provided in step (b). An “Activate PDP Context Reject” message including a cause management value (session management cause value) is transmitted to the user interface 410.

  The session management cause value is composed of 2 bytes as shown in FIG. 6, and has a 1-byte information element indicator (IEI) and a 1-byte cause value.

  An exemplary embodiment of the invention may include computer read code on a computer read medium. The computer read medium may include data storage means for storing data that can be read by the computer system. Examples of computer read media include storage mechanisms such as magnetic storage media (ROM, floppy disk, hard disk, etc.), optical recording media (CD-ROM or DVD, etc.) and carrier waves (transmission via the Internet), etc. There is. The computer-readable medium can be distributed via a network connected to the computer system, and can be stored and executed through a distribution method. In addition, the function program, code, and code segment for performing the exemplary embodiment of the present invention can be understood by those having ordinary knowledge in the technical field to which the present invention belongs.

  On the other hand, in the detailed description of the present invention, specific embodiments have been described. However, it is obvious that various modifications can be made without departing from the spirit of the present invention. Accordingly, the scope of the invention is not limited to the described embodiments, but should be determined not only by the appended claims but also by the equivalents of the claims.

1 is a diagram illustrating a hierarchical structure of a general mobile communication system. 1 is a block diagram illustrating a mobile communication terminal according to an embodiment of the present invention. 5 is a flowchart illustrating a packet service state providing process using an access class restriction list according to an embodiment of the present invention. 5 is a message flowchart illustrating a packet service state providing process according to an embodiment of the present invention. FIG. 5 is a diagram illustrating a packet service status display screen according to an embodiment of the present invention. FIG. 6 is a diagram illustrating session management cause values according to an embodiment of the present invention.

Explanation of symbols

210 Interface Module 220 Control Unit 230 Storage Unit 240 Cell Restriction Information Processing Unit 250 User Interface

Claims (18)

In a packet service state providing method using an access class restriction list in a mobile communication system,
Inspecting whether there is information that matches the access class restriction information already stored in the mobile communication terminal in the information of the access class restriction list included in the system information received by the mobile communication terminal from the network;
And providing a response to the packet service request including packet service provision unavailable information when the packet service request is made when the matching information is present.   The method of claim 1, further comprising outputting the provided packet service provision failure information.   The method of claim 1, further comprising performing a general registration process if there is no matching information.   The method of claim 1, wherein the system information is received periodically over a network. In a packet service state providing apparatus using an access class restriction list in a mobile communication system,
When there is information that matches the access class restriction list information included in the received system information and the stored access class restriction information, a response to the packet service request including the packet service provision impossible information at the time of packet service request A cell restriction information processing unit that provides
Outputting the packet service disabling information provided by the cell restriction information processing unit, and when there is a packet service request from a user, a user interface for requesting the packet service to the cell restriction information processing unit;
System information is received from the network and provided to the cell restriction information processing unit to check whether there is a restriction on access to resources within the cell. If there is the restriction, the information is provided to the user interface. And a control unit for controlling.   The apparatus of claim 5, wherein the control unit performs a general registration process when there is no information matching the access class restriction information.   6. The apparatus of claim 5, wherein the system information is periodically received via a network. In a packet service state providing system using an access class restriction list in a mobile communication system,
If packet service provision is not possible, set the access class restriction on the cell currently managed, and broadcast in the system information,
If there is information that matches the access class restriction list information contained in the system information and the stored access class restriction information, the packet service provision unavailable information is output and the packet service provision unavailable state is provided. A system including a communication terminal.   The mobile communication terminal outputs the packet service unusable state due to the access class restriction when there is a packet service request from a user when there is information matching the access class restriction information. The system according to claim 8.   The system of claim 8, wherein the system information is periodically received via a network. In a packet service state providing method of a mobile communication terminal using an access class restriction list in a mobile communication system,
Inspecting whether there is information that matches the access class restriction information already stored by the mobile communication terminal in the information of the access class restriction list included in the system information received from the network;
And generating a response to the packet service request including the packet service disabling information when a packet service is requested by a user when the matching information is present.   The method according to claim 11, further comprising outputting the generated service provision impossible information.   The method of claim 11, further comprising performing a general registration process if there is no matching information.   The method of claim 11, wherein the system information is received periodically over a network. In a computer-readable recording medium recording a program for providing a packet service state in a mobile communication system,
A first code segment for checking whether information in the access class restriction list included in the system information received from the network by the mobile communication terminal includes information that matches the access class restriction information already stored by the mobile communication terminal; ,
And a second code segment for providing a response to the packet service request including the packet service provision impossible information when the packet service request is made.   The computer-readable recording medium according to claim 15, further comprising a third code segment that outputs the provided packet service provision failure information.   16. The computer readable recording medium of claim 15, further comprising a fourth code segment that performs a general registration process when there is no matching information.   The computer-readable recording medium according to claim 15, wherein the system information is periodically received via a network.